CVE-2023-34256
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.5epss 0.2%
exploitation probability
0.2%top 86% of all CVEs
observed exploitation
nono source reports it
An issue was discovered in the Linux kernel before 6.3.3. There is an out-of-bounds read in crc16 in lib/crc16.c when called from fs/ext4/super.c because ext4_group_desc_csum does not properly check an offset. NOTE: this is disputed by third parties because the kernel is not intended to defend against attackers with the stated "When modifying the block device while it is mounted by the filesystem" access.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected products
n/a · n/aReferences
https://bugzilla.suse.com/show_bug.cgi?id=1211895https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.3.3https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4f04351888a83e595571de672e0a4a8b74f4fb31https://lists.debian.org/debian-lts-announce/2023/07/msg00030.htmlhttps://lists.debian.org/debian-lts-announce/2023/10/msg00027.htmlhttps://syzkaller.appspot.com/bug?extid=8785e41224a3afd04321